# 定义数据
num1 = "100"
num2 = "1.99"
# 强制转换
# 转换前
# print(type(num1))
# print(type(num2))
# # 转换后
# print(type(int(num1)))
# print(type(float(num2)))

info = 12345
print(type(info))
print(type(str(info)))

info1 = [11,"aa",True,1.88]
print(type(info1))
print(type(str(info1)))

# 转换为集合（集合中元素不能重复：可以去重
info2 = [11,22,33,11,11,11,33,44]
print(set(info2))
print(type(set(info2)))